<gm:page title="My App" authenticate="false">

    
  

  <div style="float:left;width:50%"> 
    <gm:list id="CAParks" data="http://www.mapnut.com/calstatepark.xml" pagesize="25"/>
  </div>
  
  

  <div style="float:left;width:50%"> 
    <gm:map id="CAParkMarkers" data="${CAParks}" latref="geo:lat" lngref="geo:long">
      <gm:handleEvent src="CAParks"/>
    </gm:map>
  </div>
    
</gm:page>